Fix prereqs for Locomotive Engineer (#963)

* concepts.wip exercises changed to deprecated

* Revert "concepts.wip exercises changed to deprecated"

This reverts commit 28f91a8.

* Change annelyns-infiltration slug for old version

* Revert "Change annelyns-infiltration slug for old version"

This reverts commit 09dfe5d.

* add tuple as locomotive-engineer prereq

---------

Co-authored-by: Colin Leach <[email protected]>

Author: colinleach

config.json

@@ -174,7 +174,8 @@
         ],
         "prerequisites": [
           "vector-operations",
-          "pairs-and-dicts"
+          "pairs-and-dicts",
+          "tuples"
         ],
         "status": "beta"
       },